//
// File:   main.cc
// Author: sempr
// refacted by zhblue
/*
 * Copyright 2008 sempr <iamsempr@gmail.com>
 *
 * Refacted and modified by zhblue<newsclan@gmail.com>
 * Bug report email newsclan@gmail.com
 *
 *
 * This file is part of HUSTOJ.
 *
 * HUSTOJ is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * HUSTOJ is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with HUSTOJ. if not, see <http://www.gnu.org/licenses/>.
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dirent.h>
#include <unistd.h>
#include <time.h>
#include <stdarg.h>
#include <ctype.h>
#include <sys/wait.h>
#include <sys/ptrace.h>
#include <sys/types.h>
#include <sys/user.h>
#include <sys/syscall.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/signal.h>
//#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <mysql/mysql.h>

#include "okcalls.h"

#define STD_MB 1048576
#define STD_T_LIM 2
#define STD_F_LIM (STD_MB<<5)
#define STD_M_LIM (STD_MB<<7)
#define BUFFER_SIZE 512

#define OJ_WT0 0
#define OJ_WT1 1
#define OJ_CI 2
#define OJ_RI 3
#define OJ_AC 4
#define OJ_PE 5
#define OJ_WA 6
#define OJ_TL 7
#define OJ_ML 8
#define OJ_OL 9
#define OJ_RE 10
#define OJ_CE 11
#define OJ_CO 12
#define OJ_TR 13
/*copy from ZOJ
 http://code.google.com/p/zoj/source/browse/trunk/judge_client/client/tracer.cc?spec=svn367&r=367#39
 */
#ifdef __i386
#define REG_SYSCALL orig_eax
#define REG_RET eax
#define REG_ARG0 ebx
#define REG_ARG1 ecx
#else
#define REG_SYSCALL orig_rax
#define REG_RET rax
#define REG_ARG0 rdi
#define REG_ARG1 rsi

#endif

static int DEBUG = 0;
static char host_name[BUFFER_SIZE];
static char user_name[BUFFER_SIZE];
static char password[BUFFER_SIZE];
static char db_name[BUFFER_SIZE];
static char oj_home[BUFFER_SIZE];
static int port_number;
static int max_running;
static int sleep_time;
static int java_time_bonus = 5;
static int java_memory_bonus = 512;
static char java_xms[BUFFER_SIZE];
static char java_xmx[BUFFER_SIZE];
static int sim_enable = 0;
static int oi_mode=0;
static int use_max_time=0;

static int http_judge=0;
static char http_baseurl[BUFFER_SIZE];

static char http_username[BUFFER_SIZE];
static char http_password[BUFFER_SIZE];

static int shm_run=0;

//static int sleep_tmp;
#define ZOJ_COM
MYSQL *conn;

static char lang_ext[12][8] = { "c", "cc", "pas", "java", "rb", "sh", "py", "php","pl", "cs","m","bas" };
//static char buf[BUFFER_SIZE];

long get_file_size(const char * filename)
{
    struct stat f_stat;

    if (stat(filename, &f_stat) == -1)
    {
        return 0;
    }

    return (long) f_stat.st_size;
}

void write_log(const char *fmt, ...)
{
    va_list ap;
    char buffer[4096];
    //      time_t          t = time(NULL);
    //int l;
    sprintf(buffer,"%s/log/client.log",oj_home);
    FILE *fp = fopen(buffer, "a+");
    if (fp == NULL)
    {
        fprintf(stderr, "openfile error!\n");
        system("pwd");
    }
    va_start(ap, fmt);
    //l =
    vsprintf(buffer, fmt, ap);
    fprintf(fp, "%s\n", buffer);
    if (DEBUG)
        printf("%s\n", buffer);
    va_end(ap);
    fclose(fp);

}
int execute_cmd(const char * fmt, ...)
{
    char cmd[BUFFER_SIZE];

    int ret = 0;
    va_list ap;

    va_start(ap, fmt);
    vsprintf(cmd, fmt, ap);
    ret = system(cmd);
    va_end(ap);
    return ret;
}


int call_counter[512];

void init_syscalls_limits(int lang)
{
    int i;
    memset(call_counter, 0, sizeof(call_counter));
    if (DEBUG)
        write_log("init_call_counter:%d", lang);
    if (lang <= 1)   // C & C++
    {
        for (i = 0; LANG_CC[i]; i++)
        {
            call_counter[LANG_CV[i]] = LANG_CC[i];
        }
    }
    else if (lang == 2)     // Pascal
    {
        for (i = 0; LANG_PC[i]; i++)
            call_counter[LANG_PV[i]] = LANG_PC[i];
    }
    else if (lang == 3)     // Java
    {
        for (i = 0; LANG_JC[i]; i++)
            call_counter[LANG_JV[i]] = LANG_JC[i];
    }
    else if (lang == 4)     // Ruby
    {
        for (i = 0; LANG_RC[i]; i++)
            call_counter[LANG_RV[i]] = LANG_RC[i];
    }
    else if (lang == 5)     // Bash
    {
        for (i = 0; LANG_BC[i]; i++)
            call_counter[LANG_BV[i]] = LANG_BC[i];
    }
    else if (lang == 6)    // Python
    {
        for (i = 0; LANG_YC[i]; i++)
            call_counter[LANG_YV[i]] = LANG_YC[i];
    }
    else if (lang == 7)    // php
    {
        for (i = 0; LANG_PHC[i]; i++)
            call_counter[LANG_PHV[i]] = LANG_PHC[i];
    }
    else if (lang == 8)    // perl
    {
        for (i = 0; LANG_PLC[i]; i++)
            call_counter[LANG_PLV[i]] = LANG_PLC[i];
    }
    else if (lang == 9)    // mono c#
    {
        for (i = 0; LANG_CSC[i]; i++)
            call_counter[LANG_CSV[i]] = LANG_CSC[i];
    }
    else if (lang==10)  //objective c
    {
        for (i = 0; LANG_OC[i]; i++)
            call_counter[LANG_OV[i]] = LANG_OC[i];
    }
    else if (lang==11)  //free basic
    {
        for (i = 0; LANG_BASICC[i]; i++)
            call_counter[LANG_BASICV[i]] = LANG_BASICC[i];
    }


}

int after_equal(char * c)
{
    int i=0;
    for(; c[i]!='\0'&&c[i]!='='; i++);
    return ++i;
}
void trim(char * c)
{
    char buf[BUFFER_SIZE];
    char * start,*end;
    strcpy(buf,c);
    start=buf;
    while(isspace(*start)) start++;
    end=start;
    while(!isspace(*end)) end++;
    *end='\0';
    strcpy(c,start);
}
bool read_buf(char * buf,const char * key,char * value)
{
    if (strncmp(buf,key, strlen(key)) == 0)
    {
        strcpy(value, buf + after_equal(buf));
        trim(value);
        if (DEBUG) printf("%s\n",value);
        return 1;
    }
    return 0;
}
void read_int(char * buf,const char * key,int * value)
{
    char buf2[BUFFER_SIZE];
    if (read_buf(buf,key,buf2))
        sscanf(buf2, "%d", value);

}
// read the configue file
void init_mysql_conf()
{
    FILE *fp=NULL;
    char buf[BUFFER_SIZE];
    host_name[0] = 0;
    user_name[0] = 0;
    password[0] = 0;
    db_name[0] = 0;
    port_number = 3306;
    max_running = 3;
    sleep_time = 3;
    strcpy(java_xms, "-Xms32m");
    strcpy(java_xmx, "-Xmx256m");
    sprintf(buf,"%s/etc/judge.conf",oj_home);
    fp = fopen("./etc/judge.conf", "r");
    if(fp!=NULL)
    {
        while (fgets(buf, BUFFER_SIZE - 1, fp))
        {
            read_buf(buf,"OJ_HOST_NAME",host_name);
            read_buf(buf, "OJ_USER_NAME",user_name);
            read_buf(buf, "OJ_PASSWORD",password);
            read_buf(buf, "OJ_DB_NAME",db_name);
            read_int(buf , "OJ_PORT_NUMBER", &port_number);
            read_int(buf, "OJ_JAVA_TIME_BONUS", &java_time_bonus);
            read_int(buf, "OJ_JAVA_MEMORY_BONUS", &java_memory_bonus);
            read_int(buf , "OJ_SIM_ENABLE", &sim_enable);
            read_buf(buf,"OJ_JAVA_XMS",java_xms);
            read_buf(buf,"OJ_JAVA_XMX",java_xmx);
            read_int(buf,"OJ_HTTP_JUDGE",&http_judge);
            read_buf(buf,"OJ_HTTP_BASEURL",http_baseurl);
            read_buf(buf,"OJ_HTTP_USERNAME",http_username);
            read_buf(buf,"OJ_HTTP_PASSWORD",http_password);
            read_int(buf , "OJ_OI_MODE", &oi_mode);
            read_int(buf , "OJ_SHM_RUN", &shm_run);
            read_int(buf , "OJ_USE_MAX_TIME", &use_max_time);

        }
        //fclose(fp);
    }
}

int isInFile(const char fname[])
{
    int l = strlen(fname);
    if (l <= 3 || strcmp(fname + l - 3, ".in") != 0)
        return 0;
    else
        return l - 3;
}

void find_next_nonspace(int & c1, int & c2, FILE *& f1, FILE *& f2, int & ret)
{
    // Find the next non-space character or \n.
    while ((isspace(c1)) || (isspace(c2)))
    {
        if (c1 != c2)
        {
            if (c2 == EOF)
            {
                do
                {
                    c1 = fgetc(f1);
                }
                while (isspace(c1));
                continue;
            }
            else if (c1 == EOF)
            {
                do
                {
                    c2 = fgetc(f2);
                }
                while (isspace(c2));
                continue;
            }
            else if ((c1 == '\r' && c2 == '\n'))
            {
                c1 = fgetc(f1);
            }
            else if ((c2 == '\r' && c1 == '\n'))
            {
                c2 = fgetc(f2);
            }
            else
            {
                if (DEBUG)
                    printf("%d=%c\t%d=%c", c1, c1, c2, c2);
                ;
                ret = OJ_PE;
            }
        }
        if (isspace(c1))
        {
            c1 = fgetc(f1);
        }
        if (isspace(c2))
        {
            c2 = fgetc(f2);
        }
    }
}

/***
 int compare_diff(const char *file1,const char *file2){
 char diff[1024];
 sprintf(diff,"diff -q -B -b -w --strip-trailing-cr %s %s",file1,file2);
 int d=system(diff);
 if (d) return OJ_WA;
 sprintf(diff,"diff -q -B --strip-trailing-cr %s %s",file1,file2);
 int p=system(diff);
 if (p) return OJ_PE;
 else return OJ_AC;

 }
 */
void make_diff_out(FILE *f1,FILE *f2,int c1,int c2)
{
    FILE *out;
    char buf[45];
    out=fopen("diff.out","a+");
    fprintf(out,"=================\n");
    fprintf(out,"Right:\n%c",c1);
    if(fgets(buf,44,f1))
    {
        fprintf(out,"%s",buf);
    }
    fprintf(out,"\n-----------------\n");
    fprintf(out,"Your:\n%c",c2);
    if(fgets(buf,44,f2))
    {
        fprintf(out,"%s",buf);
    }
    fprintf(out,"\n=================\n");
    fclose(out);
}
/*
 * translated from ZOJ judger r367
 * http://code.google.com/p/zoj/source/browse/trunk/judge_client/client/text_checker.cc#25
 *
 */
int compare_zoj(const char *file1, const char *file2)
{
    int ret = OJ_AC;
    int c1,c2;
    FILE * f1, *f2 ;
    f1 = fopen(file1, "r");
    f2 = fopen(file2, "r");
    if (!f1 || !f2)
    {
        ret = OJ_RE;
    }
    else
        for (;;)
        {
            // Find the first non-space character at the beginning of line.
            // Blank lines are skipped.
            c1 = fgetc(f1);
            c2 = fgetc(f2);
            find_next_nonspace(c1, c2, f1, f2, ret);
            // Compare the current line.
            for (;;)
            {
                // Read until 2 files return a space or 0 together.
                while ((!isspace(c1) && c1) || (!isspace(c2) && c2))
                {
                    if (c1 == EOF && c2 == EOF)
                    {
                        goto end;
                    }
                    if (c1 == EOF || c2 == EOF)
                    {
                        break;
                    }
                    if (c1 != c2)
                    {
                        // Consecutive non-space characters should be all exactly the same
                        ret = OJ_WA;
                        goto end;
                    }
                    c1 = fgetc(f1);
                    c2 = fgetc(f2);
                }
                find_next_nonspace(c1, c2, f1, f2, ret);
                if (c1 == EOF && c2 == EOF)
                {
                    goto end;
                }
                if (c1 == EOF || c2 == EOF)
                {
                    ret = OJ_WA;
                    goto end;
                }

                if ((c1 == '\n' || !c1) && (c2 == '\n' || !c2))
                {
                    break;
                }
            }
        }
end:
    if(ret==OJ_WA)make_diff_out(f1,f2,c1,c2);
    if (f1)
        fclose(f1);
    if (f2)
        fclose(f2);
    return ret;
}

void delnextline(char s[])
{
    int L;
    L = strlen(s);
    while (L > 0 && (s[L - 1] == '\n' || s[L - 1] == '\r'))
        s[--L] = 0;
}

int compare(const char *file1, const char *file2)
{
#ifdef ZOJ_COM
    //compare ported and improved from zoj don't limit file size
    return compare_zoj(file1, file2);
#endif
#ifndef ZOJ_COM
    //the original compare from the first version of hustoj has file size limit
    //and waste memory
    FILE *f1,*f2;
    char *s1,*s2,*p1,*p2;
    int PEflg;
    s1=new char[STD_F_LIM+512];
    s2=new char[STD_F_LIM+512];
    if (!(f1=fopen(file1,"r")))
        return OJ_AC;
    for (p1=s1; EOF!=fscanf(f1,"%s",p1);)
        while (*p1) p1++;
    fclose(f1);
    if (!(f2=fopen(file2,"r")))
        return OJ_RE;
    for (p2=s2; EOF!=fscanf(f2,"%s",p2);)
        while (*p2) p2++;
    fclose(f2);
    if (strcmp(s1,s2)!=0)
    {
        //              printf("A:%s\nB:%s\n",s1,s2);
        delete[] s1;
        delete[] s2;

        return OJ_WA;
    }
    else
    {
        f1=fopen(file1,"r");
        f2=fopen(file2,"r");
        PEflg=0;
        while (PEflg==0 && fgets(s1,STD_F_LIM,f1) && fgets(s2,STD_F_LIM,f2))
        {
            delnextline(s1);
            delnextline(s2);
            if (strcmp(s1,s2)==0) continue;
            else PEflg=1;
        }
        delete [] s1;
        delete [] s2;
        fclose(f1);
        fclose(f2);
        if (PEflg) return OJ_PE;
        else return OJ_AC;
    }
#endif
}

FILE * read_cmd_output(const char * fmt, ...)
{
    char cmd[BUFFER_SIZE];

    FILE *  ret =NULL;
    va_list ap;

    va_start(ap, fmt);
    vsprintf(cmd, fmt, ap);
    va_end(ap);
    if(DEBUG) printf("%s\n",cmd);
    ret = popen(cmd,"r");

    return ret;
}
bool check_login()
{
    const char  * cmd=" wget --post-data=\"checklogin=1\" --load-cookies=cookie --save-cookies=cookie --keep-session-cookies -q -O - \"%s/admin/problem_judge.php\"";
    int ret=0;
    FILE * fjobs=read_cmd_output(cmd,http_baseurl);
    fscanf(fjobs,"%d",&ret);
    pclose(fjobs);

    return ret;
}
void login()
{
    if(!check_login())
    {
        const char * cmd="wget --post-data=\"user_id=%s&password=%s\" --load-cookies=cookie --save-cookies=cookie --keep-session-cookies -q -O - \"%s/login.php\"";
        FILE * fjobs=read_cmd_output(cmd,http_username,http_password,http_baseurl);
        //fscanf(fjobs,"%d",&ret);
        pclose(fjobs);
    }

}
/* write result back to database */
void _update_solution_mysql(int solution_id, int result, int time, int memory,
                            int sim, int sim_s_id,double pass_rate)
{
    char sql[BUFFER_SIZE];
    if(oi_mode)
    {
        sprintf(
            sql,
            "UPDATE solution SET result=%d,time=%d,memory=%d,judgetime=NOW(),pass_rate=%f WHERE solution_id=%d LIMIT 1%c",
            result, time, memory, pass_rate,solution_id, 0);
    }
    else
    {
        sprintf(
            sql,
            "UPDATE solution SET result=%d,time=%d,memory=%d,judgetime=NOW() WHERE solution_id=%d LIMIT 1%c",
            result, time, memory, solution_id, 0);
    }
    //      printf("sql= %s\n",sql);
    if (mysql_real_query(conn, sql, strlen(sql)))
    {
        //              printf("..update failed! %s\n",mysql_error(conn));
    }
    if (sim)
    {
        sprintf(
            sql,
            "insert into sim(s_id,sim_s_id,sim) values(%d,%d,%d) on duplicate key update  sim_s_id=%d,sim=%d",
            solution_id, sim_s_id, sim, sim_s_id, sim);
        //      printf("sql= %s\n",sql);
        if (mysql_real_query(conn, sql, strlen(sql)))
        {
            //              printf("..update failed! %s\n",mysql_error(conn));
        }

    }

}
void _update_solution_http(int solution_id, int result, int time, int memory,int sim, int sim_s_id,double pass_rate)
{
    const char  * cmd=" wget --post-data=\"update_solution=1&sid=%d&result=%d&time=%d&memory=%d&sim=%d&simid=%d&pass_rate=%f\" --load-cookies=cookie --save-cookies=cookie --keep-session-cookies -q -O - \"%s/admin/problem_judge.php\"";
    FILE * fjobs=read_cmd_output(cmd,solution_id,result,  time,  memory, sim, sim_s_id,pass_rate,http_baseurl);
    //fscanf(fjobs,"%d",&ret);
    pclose(fjobs);
}
void update_solution(int solution_id, int result, int time, int memory,int sim, int sim_s_id,double pass_rate)
{
    if(result==OJ_TL&&memory==0) result=OJ_ML;
    if(http_judge)
    {
        _update_solution_http( solution_id,  result,  time,  memory, sim, sim_s_id,pass_rate);
    }
    else
    {
        _update_solution_mysql( solution_id,  result,  time,  memory, sim, sim_s_id,pass_rate);
    }
}
/* write compile error message back to database */
void _addceinfo_mysql(int solution_id)
{
    char sql[(1 << 16)], *end;
    char ceinfo[(1 << 16)], *cend;
    FILE *fp = fopen("ce.txt", "r");
    snprintf(sql, (1 << 16) - 1,
             "DELETE FROM compileinfo WHERE solution_id=%d", solution_id);
    mysql_real_query(conn, sql, strlen(sql));
    cend = ceinfo;
    while (fgets(cend, 1024, fp))
    {
        cend += strlen(cend);
        if (cend - ceinfo > 40000)
            break;
    }
    cend = 0;
    end = sql;
    strcpy(end, "INSERT INTO compileinfo VALUES(");
    end += strlen(sql);
    *end++ = '\'';
    end += sprintf(end, "%d", solution_id);
    *end++ = '\'';
    *end++ = ',';
    *end++ = '\'';
    end += mysql_real_escape_string(conn, end, ceinfo, strlen(ceinfo));
    *end++ = '\'';
    *end++ = ')';
    *end = 0;
    //      printf("%s\n",ceinfo);
    if (mysql_real_query(conn, sql, end - sql))
        printf("%s\n", mysql_error(conn));
    fclose(fp);
}
// urlencoded function copied from http://www.geekhideout.com/urlcode.shtml
/* Converts a hex character to its integer value */
char from_hex(char ch)
{
    return isdigit(ch) ? ch - '0' : tolower(ch) - 'a' + 10;
}

/* Converts an integer value to its hex character*/
char to_hex(char code)
{
    static char hex[] = "0123456789abcdef";
    return hex[code & 15];
}

/* Returns a url-encoded version of str */
/* IMPORTANT: be sure to free() the returned string after use */
char *url_encode(char *str)
{
    char *pstr = str, *buf =(char *) malloc(strlen(str) * 3 + 1), *pbuf = buf;
    while (*pstr)
    {
        if (isalnum(*pstr) || *pstr == '-' || *pstr == '_' || *pstr == '.' || *pstr == '~')
            *pbuf++ = *pstr;
        else if (*pstr == ' ')
            *pbuf++ = '+';
        else
            *pbuf++ = '%', *pbuf++ = to_hex(*pstr >> 4), *pbuf++ = to_hex(*pstr & 15);
        pstr++;
    }
    *pbuf = '\0';
    return buf;
}


void _addceinfo_http(int solution_id)
{

    char ceinfo[(1 << 16)], *cend;
    char * ceinfo_encode;
    FILE *fp = fopen("ce.txt", "r");

    cend = ceinfo;
    while (fgets(cend, 1024, fp))
    {
        cend += strlen(cend);
        if (cend - ceinfo > 40000)
            break;
    }
    fclose(fp);
    ceinfo_encode=url_encode(ceinfo);
    FILE * ce=fopen("ce.post","w");
    fprintf(ce,"addceinfo=1&sid=%d&ceinfo=%s",solution_id,ceinfo_encode);
    fclose(ce);
    free(ceinfo_encode);

    const char  * cmd=" wget --post-file=\"ce.post\" --load-cookies=cookie --save-cookies=cookie --keep-session-cookies -q -O - \"%s/admin/problem_judge.php\"";
    FILE * fjobs=read_cmd_output(cmd,http_baseurl);
    //fscanf(fjobs,"%d",&ret);
    pclose(fjobs);


}
void addceinfo(int solution_id)
{
    if(http_judge)
    {
        _addceinfo_http(solution_id);
    }
    else
    {
        _addceinfo_mysql(solution_id);
    }
}
/* write runtime error message back to database */
void _addreinfo_mysql(int solution_id,const char * filename)
{
    char sql[(1 << 16)], *end;
    char reinfo[(1 << 16)], *rend;
    FILE *fp = fopen(filename, "r");
    snprintf(sql, (1 << 16) - 1,
             "DELETE FROM runtimeinfo WHERE solution_id=%d", solution_id);
    mysql_real_query(conn, sql, strlen(sql));
    rend = reinfo;
    while (fgets(rend, 1024, fp))
    {
        rend += strlen(rend);
        if (rend - reinfo > 40000)
            break;
    }
    rend = 0;
    end = sql;
    strcpy(end, "INSERT INTO runtimeinfo VALUES(");
    end += strlen(sql);
    *end++ = '\'';
    end += sprintf(end, "%d", solution_id);
    *end++ = '\'';
    *end++ = ',';
    *end++ = '\'';
    end += mysql_real_escape_string(conn, end, reinfo, strlen(reinfo));
    *end++ = '\'';
    *end++ = ')';
    *end = 0;
    //      printf("%s\n",ceinfo);
    if (mysql_real_query(conn, sql, end - sql))
        printf("%s\n", mysql_error(conn));
    fclose(fp);
}

void _addreinfo_http(int solution_id,const char * filename)
{

    char reinfo[(1 << 16)], *rend;
    char * reinfo_encode;
    FILE *fp = fopen(filename, "r");

    rend = reinfo;
    while (fgets(rend, 1024, fp))
    {
        rend += strlen(rend);
        if (rend - reinfo > 40000)
            break;
    }
    fclose(fp);
    reinfo_encode=url_encode(reinfo);
    FILE * re=fopen("re.post","w");
    fprintf(re,"addreinfo=1&sid=%d&reinfo=%s",solution_id,reinfo_encode);
    fclose(re);
    free(reinfo_encode);

    const char  * cmd=" wget --post-file=\"re.post\" --load-cookies=cookie --save-cookies=cookie --keep-session-cookies -q -O - \"%s/admin/problem_judge.php\"";
    FILE * fjobs=read_cmd_output(cmd,http_baseurl);
    //fscanf(fjobs,"%d",&ret);
    pclose(fjobs);


}
void addreinfo(int solution_id)
{
    if(http_judge)
    {
        _addreinfo_http(solution_id,"error.out");
    }
    else
    {
        _addreinfo_mysql(solution_id,"error.out");
    }
}


void adddiffinfo(int solution_id)
{


    if(http_judge)
    {
        _addreinfo_http(solution_id,"diff.out");
    }
    else
    {
        _addreinfo_mysql(solution_id,"diff.out");
    }
}
void addcustomout(int solution_id)
{


    if(http_judge)
    {
        _addreinfo_http(solution_id,"user.out");
    }
    else
    {
        _addreinfo_mysql(solution_id,"user.out");
    }
}

void _update_user_mysql(char * user_id)
{
    char sql[BUFFER_SIZE];
    sprintf(
        sql,
        "UPDATE `users` SET `solved`=(SELECT count(DISTINCT `problem_id`) FROM `solution` WHERE `user_id`=\'%s\' AND `result`=\'4\') WHERE `user_id`=\'%s\'",
        user_id, user_id);
    if (mysql_real_query(conn, sql, strlen(sql)))
        write_log(mysql_error(conn));
    sprintf(
        sql,
        "UPDATE `users` SET `submit`=(SELECT count(*) FROM `solution` WHERE `user_id`=\'%s\') WHERE `user_id`=\'%s\'",
        user_id, user_id);
    if (mysql_real_query(conn, sql, strlen(sql)))
        write_log(mysql_error(conn));
}
void _update_user_http(char * user_id)
{

    const char  * cmd=" wget --post-data=\"updateuser=1&user_id=%s\" --load-cookies=cookie --save-cookies=cookie --keep-session-cookies -q -O - \"%s/admin/problem_judge.php\"";
    FILE * fjobs=read_cmd_output(cmd,user_id,http_baseurl);
    //fscanf(fjobs,"%d",&ret);
    pclose(fjobs);
}
void update_user(char  * user_id)
{
    if(http_judge)
    {
        _update_user_http(user_id);
    }
    else
    {
        _update_user_mysql(user_id);
    }
}

void _update_problem_http(int pid)
{
    const char  * cmd=" wget --post-data=\"updateproblem=1&pid=%d\" --load-cookies=cookie --save-cookies=cookie --keep-session-cookies -q -O - \"%s/admin/problem_judge.php\"";
    FILE * fjobs=read_cmd_output(cmd,pid,http_baseurl);
    //fscanf(fjobs,"%d",&ret);
    pclose(fjobs);
}
void _update_problem_mysql(int p_id)
{
    char sql[BUFFER_SIZE];
    sprintf(
        sql,
        "UPDATE `problem` SET `accepted`=(SELECT count(*) FROM `solution` WHERE `problem_id`=\'%d\' AND `result`=\'4\') WHERE `problem_id`=\'%d\'",
        p_id, p_id);
    if (mysql_real_query(conn, sql, strlen(sql)))
        write_log(mysql_error(conn));
    sprintf(
        sql,
        "UPDATE `problem` SET `submit`=(SELECT count(*) FROM `solution` WHERE `problem_id`=\'%d\') WHERE `problem_id`=\'%d\'",
        p_id, p_id);
    if (mysql_real_query(conn, sql, strlen(sql)))
        write_log(mysql_error(conn));
}
void update_problem(int pid)
{
    if(http_judge)
    {
        _update_problem_http(pid);
    }
    else
    {
        _update_problem_mysql(pid);
    }
}
int compile(int lang)
{
    int pid;

    const char * CP_C[] = { "gcc", "Main.c", "-o", "Main", "-O2","-Wall", "-lm",
                            "--static", "-std=c99", "-DONLINE_JUDGE", NULL
                          };
    const char * CP_X[] = { "g++", "Main.cc", "-o", "Main","-O2", "-Wall",
                            "-lm", "--static", "-DONLINE_JUDGE", NULL
                          };
    const char * CP_P[] = { "fpc", "Main.pas", "-O2","-Co", "-Ct","-Ci", NULL };
//      const char * CP_J[] = { "javac", "-J-Xms32m", "-J-Xmx256m", "Main.java",NULL };

    const char * CP_R[] = { "ruby", "-c", "Main.rb", NULL };
    const char * CP_B[] = { "chmod", "+rx", "Main.sh", NULL };
    const char * CP_Y[] = { "python","-c","import py_compile; py_compile.compile(r'Main.py')", NULL };
    const char * CP_PH[] = { "php", "-l","Main.php", NULL };
    const char * CP_PL[] = { "perl","-c", "Main.pl", NULL };
    const char * CP_CS[] = { "gmcs","-warn:0", "Main.cs", NULL };
    const char * CP_OC[]= {"gcc","-o","Main","Main.m","-fconstant-string-class=NSConstantString","-I","/usr/include/GNUstep/","-L","/usr/lib/GNUstep/Libraries/","-lobjc","-lgnustep-base",NULL};
    const char * CP_BS[]= {"fbc","-static","Main.bas",NULL};
    char javac_buf[4][16];
    char *CP_J[5];
    for(int i=0; i<4; i++) CP_J[i]=javac_buf[i];
    sprintf(CP_J[0],"javac");
    sprintf(CP_J[1],"-J%s",java_xms);
    sprintf(CP_J[2],"-J%s",java_xmx);
    sprintf(CP_J[3],"Main.java");
    CP_J[4]=(char *)NULL;

    pid = fork();
    if (pid == 0)
    {
        struct rlimit LIM;
        LIM.rlim_max = 60;
        LIM.rlim_cur = 60;
        setrlimit(RLIMIT_CPU, &LIM);

        LIM.rlim_max = 90 * STD_MB;
        LIM.rlim_cur = 90 * STD_MB;
        setrlimit(RLIMIT_FSIZE, &LIM);

        LIM.rlim_max = 1024 * STD_MB;
        LIM.rlim_cur = 1024 * STD_MB;
        setrlimit(RLIMIT_AS, &LIM);
        if (lang != 2)
        {
            freopen("ce.txt", "w", stderr);
            //freopen("/dev/null", "w", stdout);
        }
        else
        {
            freopen("ce.txt", "w", stdout);
        }
        switch (lang)
        {
        case 0:
            execvp(CP_C[0], (char * const *) CP_C);
            break;
        case 1:
            execvp(CP_X[0], (char * const *) CP_X);
            break;
        case 2:
            execvp(CP_P[0], (char * const *) CP_P);
            break;
        case 3:
            execvp(CP_J[0], (char * const *) CP_J);
            break;
        case 4:
            execvp(CP_R[0], (char * const *) CP_R);
            break;
        case 5:
            execvp(CP_B[0], (char * const *) CP_B);
            break;
        case 6:
            execvp(CP_Y[0], (char * const *) CP_Y);
            break;
        case 7:
            execvp(CP_PH[0], (char * const *) CP_PH);
            break;
        case 8:
            execvp(CP_PL[0], (char * const *) CP_PL);
            break;
        case 9:
            execvp(CP_CS[0], (char * const *) CP_CS);
            break;

        case 10:
            execvp(CP_OC[0], (char * const *) CP_OC);
            break;
        case 11:
            execvp(CP_BS[0], (char * const *) CP_BS);
            break;
        default:
            printf("nothing to do!\n");
        }
        if (DEBUG)
            printf("compile end!\n");
        //exit(!system("cat ce.txt"));
        exit(0);
    }
    else
    {
        int status=0;

        waitpid(pid, &status, 0);
        if(lang>3&&lang<7)
            status=get_file_size("ce.txt");
        if (DEBUG)
            printf("status=%d\n", status);
        return status;
    }

}
/*
 int read_proc_statm(int pid){
 FILE * pf;
 char fn[4096];
 int ret;
 sprintf(fn,"/proc/%d/statm",pid);
 pf=fopen(fn,"r");
 fscanf(pf,"%d",&ret);
 fclose(pf);
 return ret;
 }
 */
int get_proc_status(int pid, const char * mark)
{
    FILE * pf;
    char fn[BUFFER_SIZE], buf[BUFFER_SIZE];
    int ret = 0;
    sprintf(fn, "/proc/%d/status", pid);
    pf = fopen(fn, "r");
    int m = strlen(mark);
    while (pf && fgets(buf, BUFFER_SIZE - 1, pf))
    {

        buf[strlen(buf) - 1] = 0;
        if (strncmp(buf, mark, m) == 0)
        {
            sscanf(buf + m + 1, "%d", &ret);
        }
    }
    if (pf)
        fclose(pf);
    return ret;
}
int init_mysql_conn()
{


    conn = mysql_init(NULL);
    //mysql_real_connect(conn,host_name,user_name,password,db_name,port_number,0,0);
    const char timeout = 30;
    mysql_options(conn, MYSQL_OPT_CONNECT_TIMEOUT, &timeout);

    if (!mysql_real_connect(conn, host_name, user_name, password, db_name,
                            port_number, 0, 0))
    {
        write_log("%s", mysql_error(conn));
        return 0;
    }
    const char * utf8sql = "set names utf8";
    if (mysql_real_query(conn, utf8sql, strlen(utf8sql)))
    {
        write_log("%s", mysql_error(conn));
        return 0;
    }
    return 1;
}
void _get_solution_mysql(int solution_id, char * work_dir, int lang)
{
    char sql[BUFFER_SIZE], src_pth[BUFFER_SIZE];
    // get the source code
    MYSQL_RES *res;
    MYSQL_ROW row;
    sprintf(sql, "SELECT source FROM source_code WHERE solution_id=%d",
            solution_id);
    mysql_real_query(conn, sql, strlen(sql));
    res = mysql_store_result(conn);
    row = mysql_fetch_row(res);


    // create the src file
    sprintf(src_pth, "Main.%s", lang_ext[lang]);
    if (DEBUG)
        printf("Main=%s", src_pth);
    FILE *fp_src = fopen(src_pth, "w");
    fprintf(fp_src, "%s", row[0]);
    mysql_free_result(res);
    fclose(fp_src);
}
void _get_solution_http(int solution_id, char * work_dir, int lang)
{
    char  src_pth[BUFFER_SIZE];

    // create the src file
    sprintf(src_pth, "Main.%s", lang_ext[lang]);
    if (DEBUG)
        printf("Main=%s", src_pth);

    //login();

    const char  * cmd2="wget --post-data=\"getsolution=1&sid=%d\" --load-cookies=cookie --save-cookies=cookie --keep-session-cookies -q -O %s \"%s/admin/problem_judge.php\"";
    FILE * pout=read_cmd_output(cmd2,solution_id,src_pth,http_baseurl);

    pclose(pout);

}
void get_solution(int solution_id, char * work_dir, int lang)
{
    if(http_judge)
    {
        _get_solution_http(solution_id,  work_dir, lang) ;
    }
    else
    {
        _get_solution_mysql(solution_id, work_dir, lang) ;
    }


}

void _get_custominput_mysql(int solution_id, char * work_dir)
{
    char sql[BUFFER_SIZE], src_pth[BUFFER_SIZE];
    // get the source code
    MYSQL_RES *res;
    MYSQL_ROW row;
    sprintf(sql, "SELECT input_text FROM custominput WHERE solution_id=%d",
            solution_id);
    mysql_real_query(conn, sql, strlen(sql));
    res = mysql_store_result(conn);
    row = mysql_fetch_row(res);
    if(row!=NULL)
    {

        // create the src file
        sprintf(src_pth, "data.in");
        FILE *fp_src = fopen(src_pth, "w");
        fprintf(fp_src, "%s", row[0]);
        fclose(fp_src);

    }
    mysql_free_result(res);
}
void _get_custominput_http(int solution_id, char * work_dir)
{
    char  src_pth[BUFFER_SIZE];

    // create the src file
    sprintf(src_pth, "data.in");

    //login();

    const char  * cmd2="wget --post-data=\"getcustominput=1&sid=%d\" --load-cookies=cookie --save-cookies=cookie --keep-session-cookies -q -O %s \"%s/admin/problem_judge.php\"";
    FILE * pout=read_cmd_output(cmd2,solution_id,src_pth,http_baseurl);

    pclose(pout);

}
void get_custominput(int solution_id, char * work_dir)
{
    if(http_judge)
    {
        _get_custominput_http(solution_id,  work_dir) ;
    }
    else
    {
        _get_custominput_mysql(solution_id, work_dir) ;
    }
}



void _get_solution_info_mysql(int solution_id, int & p_id, char * user_id, int & lang)
{


    MYSQL_RES *res;
    MYSQL_ROW row;

    char sql[BUFFER_SIZE];
    // get the problem id and user id from Table:solution
    sprintf(
        sql,
        "SELECT problem_id, user_id, language FROM solution where solution_id=%d",
        solution_id);
    //printf("%s\n",sql);
    mysql_real_query(conn, sql, strlen(sql));
    res = mysql_store_result(conn);
    row = mysql_fetch_row(res);
    p_id = atoi(row[0]);
    strcpy(user_id, row[1]);
    lang = atoi(row[2]);
    mysql_free_result(res);
}

void _get_solution_info_http(int solution_id, int & p_id, char * user_id, int & lang)
{

    login();

    const char  * cmd="wget --post-data=\"getsolutioninfo=1&sid=%d\" --load-cookies=cookie --save-cookies=cookie --keep-session-cookies -q -O - \"%s/admin/problem_judge.php\"";
    FILE * pout=read_cmd_output(cmd,solution_id,http_baseurl);
    fscanf(pout,"%d",&p_id);
    fscanf(pout,"%s",user_id);
    fscanf(pout,"%d",&lang);
    pclose(pout);

}
void get_solution_info(int solution_id, int & p_id, char * user_id, int & lang)
{

    if(http_judge)
    {
        _get_solution_info_http(solution_id,p_id,user_id,lang);
    }
    else
    {
        _get_solution_info_mysql(solution_id,p_id,user_id,lang);
    }
}


void _get_problem_info_mysql(int p_id, int & time_lmt, int & mem_lmt, int & isspj)
{
    // get the problem info from Table:problem
    char sql[BUFFER_SIZE];
    MYSQL_RES *res;
    MYSQL_ROW row;
    sprintf(
        sql,
        "SELECT time_limit,memory_limit,spj FROM problem where problem_id=%d",
        p_id);
    mysql_real_query(conn, sql, strlen(sql));
    res = mysql_store_result(conn);
    row = mysql_fetch_row(res);
    time_lmt = atoi(row[0]);
    mem_lmt = atoi(row[1]);
    isspj = row[2][0] - '0';
    mysql_free_result(res);
}

void _get_problem_info_http(int p_id, int & time_lmt, int & mem_lmt, int & isspj)
{
    //login();

    const char  * cmd="wget --post-data=\"getprobleminfo=1&pid=%d\" --load-cookies=cookie --save-cookies=cookie --keep-session-cookies -q -O - \"%s/admin/problem_judge.php\"";
    FILE * pout=read_cmd_output(cmd,p_id,http_baseurl);
    fscanf(pout,"%d",&time_lmt);
    fscanf(pout,"%d",&mem_lmt);
    fscanf(pout,"%d",&isspj);
    pclose(pout);
}

void get_problem_info(int p_id, int & time_lmt, int & mem_lmt, int & isspj)
{
    if(http_judge)
    {
        _get_problem_info_http(p_id,time_lmt,mem_lmt,isspj);
    }
    else
    {
        _get_problem_info_mysql(p_id,time_lmt,mem_lmt,isspj);
    }
}

void prepare_files(char * filename, int namelen, char * infile, int & p_id,
                   char * work_dir, char * outfile, char * userfile, int runner_id)
{
    //              printf("ACflg=%d %d check a file!\n",ACflg,solution_id);

    char  fname[BUFFER_SIZE];
    strncpy(fname, filename, namelen);
    fname[namelen] = 0;
    sprintf(infile, "%s/data/%d/%s.in", oj_home, p_id, fname);
    execute_cmd("cp %s %s/data.in", infile, work_dir);
    execute_cmd("cp %s/data/%d/*.dic %s/", oj_home, p_id,work_dir);

    sprintf(outfile, "%s/data/%d/%s.out", oj_home, p_id, fname);
    sprintf(userfile, "%s/run%d/user.out", oj_home, runner_id);
}

void copy_shell_runtime(char * work_dir)
{


    execute_cmd("mkdir %s/lib", work_dir);
    execute_cmd("mkdir %s/lib64", work_dir);
    execute_cmd("mkdir %s/bin", work_dir);
    execute_cmd("cp /lib/* %s/lib/", work_dir);
    execute_cmd("cp -a /lib/i386-linux-gnu %s/lib/", work_dir);
    execute_cmd("cp /lib64/* %s/lib64/", work_dir);
    execute_cmd("cp -a /lib32 %s/", work_dir);
    execute_cmd("cp /bin/busybox %s/bin/", work_dir);
    execute_cmd("ln -s /bin/busybox %s/bin/sh", work_dir);
    execute_cmd("cp /bin/bash %s/bin/bash", work_dir);


}
void copy_objc_runtime(char * work_dir)
{
    copy_shell_runtime(work_dir);
    execute_cmd("mkdir -p %s/proc",work_dir);
    execute_cmd("mount -o bind /proc %s/proc", work_dir);
    execute_cmd("mkdir -p %s/lib/",work_dir);
    execute_cmd("cp -aL /lib/libdbus-1.so.3                          %s/lib/ ", work_dir);
    execute_cmd("cp -aL /lib/libgcc_s.so.1                           %s/lib/ ", work_dir);
    execute_cmd("cp -aL /lib/libgcrypt.so.11                         %s/lib/ ", work_dir);
    execute_cmd("cp -aL /lib/libgpg-error.so.0                       %s/lib/ ", work_dir);
    execute_cmd("cp -aL /lib/libz.so.1                               %s/lib/ ", work_dir);
    execute_cmd("cp -aL /lib/tls/i686/cmov/libc.so.6                 %s/lib/ ", work_dir);
    execute_cmd("cp -aL /lib/tls/i686/cmov/libdl.so.2                %s/lib/ ", work_dir);
    execute_cmd("cp -aL /lib/tls/i686/cmov/libm.so.6                 %s/lib/ ", work_dir);
    execute_cmd("cp -aL /lib/tls/i686/cmov/libnsl.so.1               %s/lib/ ", work_dir);
    execute_cmd("cp -aL /lib/tls/i686/cmov/libpthread.so.0           %s/lib/ ", work_dir);
    execute_cmd("cp -aL /lib/tls/i686/cmov/librt.so.1                %s/lib/ ", work_dir);
    execute_cmd("cp -aL /usr/lib/libavahi-client.so.3                %s/lib/ ", work_dir);
    execute_cmd("cp -aL /usr/lib/libavahi-common.so.3                %s/lib/ ", work_dir);
    execute_cmd("cp -aL /usr/lib/libdns_sd.so.1                      %s/lib/ ", work_dir);
    execute_cmd("cp -aL /usr/lib/libffi.so.5                         %s/lib/ ", work_dir);
    execute_cmd("cp -aL /usr/lib/libgnustep-base.so.1.19             %s/lib/ ", work_dir);
    execute_cmd("cp -aL /usr/lib/libgnutls.so.26                     %s/lib/ ", work_dir);
    execute_cmd("cp -aL /usr/lib/libobjc.so.2                        %s/lib/ ", work_dir);
    execute_cmd("cp -aL /usr/lib/libtasn1.so.3                       %s/lib/ ", work_dir);
    execute_cmd("cp -aL /usr/lib/libxml2.so.2                        %s/lib/ ", work_dir);
    execute_cmd("cp -aL /usr/lib/libxslt.so.1                        %s/lib/ ", work_dir);

}
void copy_bash_runtime(char * work_dir)
{
    //char cmd[BUFFER_SIZE];
    //const char * ruby_run="/usr/bin/ruby";
    copy_shell_runtime(work_dir);
    execute_cmd("cp `which bc`  %s/bin/", work_dir);
    execute_cmd("busybox dos2unix Main.sh", work_dir);
    execute_cmd("ln -s /bin/busybox %s/bin/grep", work_dir);
    execute_cmd("ln -s /bin/busybox %s/bin/awk", work_dir);
    execute_cmd("cp /bin/sed %s/bin/sed", work_dir);
    execute_cmd("ln -s /bin/busybox %s/bin/cut", work_dir);
    execute_cmd("ln -s /bin/busybox %s/bin/sort", work_dir);
    execute_cmd("ln -s /bin/busybox %s/bin/join", work_dir);
    execute_cmd("ln -s /bin/busybox %s/bin/wc", work_dir);
    execute_cmd("ln -s /bin/busybox %s/bin/tr", work_dir);
    execute_cmd("ln -s /bin/busybox %s/bin/dc", work_dir);
    execute_cmd("ln -s /bin/busybox %s/bin/dd", work_dir);
    execute_cmd("ln -s /bin/busybox %s/bin/cat", work_dir);
    execute_cmd("ln -s /bin/busybox %s/bin/tail", work_dir);
    execute_cmd("ln -s /bin/busybox %s/bin/head", work_dir);
    execute_cmd("ln -s /bin/busybox %s/bin/xargs", work_dir);
    execute_cmd("chmod +rx %s/Main.sh", work_dir);

}
void copy_ruby_runtime(char * work_dir)
{

    copy_shell_runtime(work_dir);
    execute_cmd("mkdir %s/usr", work_dir);
    execute_cmd("mkdir %s/usr/lib", work_dir);
    execute_cmd("cp /usr/lib/libruby* %s/usr/lib/", work_dir);
    execute_cmd("cp /usr/bin/ruby* %s/", work_dir);

}
void copy_python_runtime(char * work_dir)
{

    copy_shell_runtime(work_dir);
    execute_cmd("mkdir %s/usr", work_dir);
    execute_cmd("mkdir %s/usr/lib", work_dir);
    execute_cmd("cp /usr/bin/python* %s/", work_dir);

}
void copy_php_runtime(char * work_dir)
{

    copy_shell_runtime(work_dir);
    execute_cmd("mkdir %s/usr", work_dir);
    execute_cmd("mkdir %s/usr/lib", work_dir);
    execute_cmd("cp /usr/lib/libedit* %s/usr/lib/", work_dir);
    execute_cmd("cp /usr/lib/libdb* %s/usr/lib/", work_dir);
    execute_cmd("cp /usr/lib/libgssapi_krb5* %s/usr/lib/", work_dir);
    execute_cmd("cp /usr/lib/libkrb5* %s/usr/lib/", work_dir);
    execute_cmd("cp /usr/lib/libk5crypto* %s/usr/lib/", work_dir);
    execute_cmd("cp /usr/lib/libxml2* %s/usr/lib/", work_dir);
    execute_cmd("cp /usr/bin/php* %s/", work_dir);
    execute_cmd("chmod +rx %s/Main.php", work_dir);

}
void copy_perl_runtime(char * work_dir)
{

    copy_shell_runtime(work_dir);
    execute_cmd("mkdir %s/usr", work_dir);
    execute_cmd("mkdir %s/usr/lib", work_dir);
    execute_cmd("cp /usr/lib/libperl* %s/usr/lib/", work_dir);
    execute_cmd("cp /usr/bin/perl* %s/", work_dir);

}
void copy_mono_runtime(char * work_dir)
{

    copy_shell_runtime(work_dir);
    execute_cmd("mkdir %s/usr", work_dir);
    execute_cmd("mkdir %s/proc", work_dir);
    execute_cmd("mkdir -p %s/usr/lib/mono/2.0", work_dir);

    execute_cmd("cp -a /usr/lib/mono %s/usr/lib/", work_dir);

    execute_cmd("cp /usr/lib/libgthread* %s/usr/lib/", work_dir);

    execute_cmd("mount -o bind /proc %s/proc", work_dir);
    execute_cmd("cp /usr/bin/mono* %s/", work_dir);

    execute_cmd("cp /usr/lib/libgthread* %s/usr/lib/", work_dir);
    execute_cmd("cp /lib/libglib* %s/lib/", work_dir);
    execute_cmd("cp /lib/tls/i686/cmov/lib* %s/lib/tls/i686/cmov/", work_dir);
    execute_cmd("cp /lib/libpcre* %s/lib/", work_dir);
    execute_cmd("cp /lib/ld-linux* %s/lib/", work_dir);
    execute_cmd("cp /lib64/ld-linux* %s/lib64/", work_dir);
    execute_cmd("mkdir -p %s/home/judge", work_dir);
    execute_cmd("chown judge %s/home/judge", work_dir);
    execute_cmd("mkdir -p %s/etc", work_dir);
    execute_cmd("grep judge /etc/passwd>%s/etc/passwd", work_dir);


}

void run_solution(int & lang, char * work_dir, int & time_lmt, int & usedtime,
                  int & mem_lmt)
{
    nice(19);
    // now the user is "judger"
    chdir(work_dir);
    // open the files
    freopen("data.in", "r", stdin);
    freopen("user.out", "w", stdout);
    freopen("error.out", "a+", stderr);
    // trace me
    ptrace(PTRACE_TRACEME, 0, NULL, NULL);
    // run me
    if (lang != 3)
        chroot(work_dir);

    while(setgid(1536)!=0) sleep(1);
    while(setuid(1536)!=0) sleep(1);
    while(setresuid(1536, 1536, 1536)!=0) sleep(1);

//      char java_p1[BUFFER_SIZE], java_p2[BUFFER_SIZE];
    // child
    // set the limit
    struct rlimit LIM; // time limit, file limit& memory limit
    // time limit
    if(oi_mode)
        LIM.rlim_cur = time_lmt+1;
    else
        LIM.rlim_cur = (time_lmt - usedtime / 1000) + 1;
    LIM.rlim_max = LIM.rlim_cur;
    //if(DEBUG) printf("LIM_CPU=%d",(int)(LIM.rlim_cur));
    setrlimit(RLIMIT_CPU, &LIM);
    alarm(0);
    alarm(time_lmt*10);

    // file limit
    LIM.rlim_max = STD_F_LIM + STD_MB;
    LIM.rlim_cur = STD_F_LIM;
    setrlimit(RLIMIT_FSIZE, &LIM);
    // proc limit
    switch(lang)
    {
    case 3:  //java
        LIM.rlim_cur=LIM.rlim_max=50;
        break;
    case 5: //bash
        LIM.rlim_cur=LIM.rlim_max=3;
        break;
    case 9: //C#
        LIM.rlim_cur=LIM.rlim_max=3;
        break;
    default:
        LIM.rlim_cur=LIM.rlim_max=1;
    }

    setrlimit(RLIMIT_NPROC, &LIM);

    // set the stack
    LIM.rlim_cur = STD_MB << 6;
    LIM.rlim_max = STD_MB << 6;
    setrlimit(RLIMIT_STACK, &LIM);
    // set the memory
    LIM.rlim_cur = STD_MB *mem_lmt/2*3;
    LIM.rlim_max = STD_MB *mem_lmt*2;
    if(lang<3)
        setrlimit(RLIMIT_AS, &LIM);



    switch (lang)
    {
    case 0:
    case 1:
    case 2:
    case 10:
    case 11:
        execl("./Main", "./Main", (char *)NULL);
        break;
    case 3:
//              sprintf(java_p1, "-Xms%dM", mem_lmt / 2);
//              sprintf(java_p2, "-Xmx%dM", mem_lmt);

        execl("/usr/bin/java", "/usr/bin/java", java_xms,java_xmx,
              "-Djava.security.manager",
              "-Djava.security.policy=./java.policy", "Main", (char *)NULL);
        break;
    case 4:
        //system("/ruby Main.rb<data.in");
        execl("/ruby","/ruby", "Main.rb", (char *)NULL);
        break;
    case 5: //bash
        execl("/bin/bash","/bin/bash" ,"Main.sh",(char *)NULL);
        break;
    case 6: //Python
        execl("/python","/python","Main.py",(char *)NULL);
        break;
    case 7: //php
        execl("/php","/php","Main.php",(char *)NULL);
        break;
    case 8: //perl
        execl("/perl","/perl","Main.pl",(char *)NULL);
        break;
    case 9: //Mono C#
        execl("/mono","/mono","--debug","Main.exe",(char *)NULL);
        break;
    }
    //sleep(1);
    exit(0);
}
int fix_java_mis_judge(char *work_dir, int & ACflg, int & topmemory,
                       int mem_lmt)
{
    int comp_res = OJ_AC;
    if (DEBUG)
        execute_cmd("cat %s/error.out", work_dir);
    comp_res = execute_cmd("grep 'java.lang.OutOfMemoryError'  %s/error.out",
                           work_dir);

    if (!comp_res)
    {
        printf("JVM need more Memory!");
        ACflg = OJ_ML;
        topmemory = mem_lmt * STD_MB;
    }
    comp_res = execute_cmd("grep 'java.lang.OutOfMemoryError'  %s/user.out",
                           work_dir);

    if (!comp_res)
    {
        printf("JVM need more Memory or Threads!");
        ACflg = OJ_ML;
        topmemory = mem_lmt * STD_MB;
    }
    comp_res = execute_cmd("grep 'Could not create'  %s/error.out", work_dir);

    if (!comp_res)
    {
        printf("jvm need more resource,tweak -Xmx(OJ_JAVA_BONUS) Settings");
        ACflg = OJ_RE;
        //topmemory=0;
    }
    return comp_res;
}

void judge_solution(int & ACflg, int & usedtime, int time_lmt, int isspj,
                    int p_id, char * infile, char * outfile, char * userfile, int & PEflg,
                    int lang, char * work_dir, int & topmemory, int mem_lmt, int solution_id ,double num_of_test)
{
    //usedtime-=1000;

    int comp_res;
    if(!oi_mode) num_of_test=1.0;
    if (ACflg == OJ_AC && usedtime > time_lmt * 1000*(num_of_test+1.0))
        ACflg = OJ_TL;
    if(topmemory>mem_lmt * STD_MB) ACflg=OJ_ML; //issues79
    // compare
    if (ACflg == OJ_AC)
    {
        if (isspj)
        {
            comp_res = execute_cmd("%s/data/%d/spj %s %s %s", oj_home,
                                   p_id, infile, outfile, userfile);

            if (comp_res == 0)
                comp_res = OJ_AC;
            else
            {
                if (DEBUG)
                    printf("fail test %s\n", infile);
                comp_res = OJ_WA;
            }
        }
        else
        {
            comp_res = compare(outfile, userfile);
        }
        if (comp_res == OJ_WA)
        {
            ACflg = OJ_WA;
            if (DEBUG)
                printf("fail test %s\n", infile);
        }
        else if (comp_res == OJ_PE)
            PEflg = OJ_PE;
        ACflg = comp_res;
    }
    //jvm popup messages, if don't consider them will get miss-WrongAnswer
    if (lang == 3 && ACflg != OJ_AC)
    {
        comp_res = fix_java_mis_judge(work_dir, ACflg, topmemory, mem_lmt);
    }
}

int get_page_fault_mem(struct rusage & ruse, pid_t & pidApp)
{
    //java use pagefault
    int m_vmpeak, m_vmdata, m_minflt;
    m_minflt = ruse.ru_minflt * getpagesize();
    if (0 && DEBUG)
    {
        m_vmpeak = get_proc_status(pidApp, "VmPeak:");
        m_vmdata = get_proc_status(pidApp, "VmData:");
        printf("VmPeak:%d KB VmData:%d KB minflt:%d KB\n", m_vmpeak, m_vmdata,
               m_minflt >> 10);
    }
    return m_minflt;
}
void print_runtimeerror(char * err)
{
    FILE *ferr=fopen("error.out","a+");
    fprintf(ferr,"Runtime Error:%s\n",err);
    fclose(ferr);
}
void clean_session(pid_t p)
{
    //char cmd[BUFFER_SIZE];
    const char *pre = "ps awx -o \"\%p \%P\"|grep -w ";
    const char *post = " | awk \'{ print $1  }\'|xargs kill -9";
    execute_cmd("%s %d %s",pre,p,post);
    execute_cmd("ps aux |grep \\^judge|awk '{print $2}'|xargs kill");
}

void watch_solution(pid_t pidApp, char * infile, int & ACflg, int isspj,
                    char * userfile, char * outfile, int solution_id, int lang,
                    int & topmemory, int mem_lmt, int & usedtime, int time_lmt, int & p_id,
                    int & PEflg, char * work_dir)
{
    // parent
    int tempmemory;
    int sub_level=0;
    if (DEBUG)
        printf("pid=%d judging %s\n", pidApp, infile);

    int status, sig, exitcode;
    struct user_regs_struct reg;
    struct rusage ruse;
    int sub = 0;
    pid_t subwatcher=0;
    while (1)
    {
        // check the usage

        wait4(-1, &status, 0, &ruse);


        //jvm gc ask VM before need,so used kernel page fault times and page size
        if (lang == 3)
        {
            tempmemory = get_page_fault_mem(ruse, pidApp);
        }
        else    //other use VmPeak
        {
            tempmemory = get_proc_status(pidApp, "VmPeak:") << 10;
        }
        if (tempmemory > topmemory)
            topmemory = tempmemory;
        if (topmemory > mem_lmt * STD_MB)
        {
            if (DEBUG)
                printf("out of memory %d\n", topmemory);
            if (ACflg == OJ_AC)
                ACflg = OJ_ML;
            ptrace(PTRACE_KILL, pidApp, NULL, NULL);
            break;
        }
        //sig = status >> 8;/*status >> 8 Ã¥Â·Â®Ã¤Â¸ÂÃ¥Â¤Å¡Ã¦ËÂ¯EXITCODE*/

        if (WIFEXITED(status))
            break;
        if ((lang < 4 || lang == 9) && get_file_size("error.out")&&!oi_mode)
        {
            ACflg = OJ_RE;
            //addreinfo(solution_id);
            ptrace(PTRACE_KILL, pidApp, NULL, NULL);
            break;
        }

        if (!isspj && get_file_size(userfile) > get_file_size(outfile) * 2+1024)
        {
            ACflg = OJ_OL;
            ptrace(PTRACE_KILL, pidApp, NULL, NULL);
            break;
        }

        exitcode = WEXITSTATUS(status);
        /*exitcode == 5 waiting for next CPU allocation          * ruby using system to run,exit 17 ok
         *  */
        if ((lang >= 3 && exitcode == 17) || exitcode == 0x05 || exitcode == 0)
            //go on and on
            ;
        else
        {

            if (DEBUG)
            {
                printf("status>>8=%d\n", exitcode);

            }
            //psignal(exitcode, NULL);

            if (ACflg == OJ_AC)
            {
                switch (exitcode)
                {
                case SIGCHLD:
                case SIGALRM:
                    alarm(0);
                case SIGKILL:
                case SIGXCPU:
                    ACflg = OJ_TL;
                    break;
                case SIGXFSZ:
                    ACflg = OJ_OL;
                    break;
                default:
                    ACflg = OJ_RE;
                }
                print_runtimeerror(strsignal(exitcode));
            }
            ptrace(PTRACE_KILL, pidApp, NULL, NULL);

            break;
        }
        if (WIFSIGNALED(status))
        {
            /*  WIFSIGNALED: if the process is terminated by signal
             *
             *  psignal(int sig, char *s)，like perror(char *s)，print out s, with error msg from system of sig
                   * sig = 5 means Trace/breakpoint trap
                   * sig = 11 means Segmentation fault
                   * sig = 25 means File size limit exceeded
                   */
            sig = WTERMSIG(status);

            if (DEBUG)
            {
                printf("WTERMSIG=%d\n", sig);
                psignal(sig, NULL);
            }
            if (ACflg == OJ_AC)
            {
                switch (sig)
                {
                case SIGCHLD:
                case SIGALRM:
                    alarm(0);
                case SIGKILL:
                case SIGXCPU:
                    ACflg = OJ_TL;
                    break;
                case SIGXFSZ:
                    ACflg = OJ_OL;
                    break;

                default:
                    ACflg = OJ_RE;
                }
                print_runtimeerror(strsignal(sig));
            }
            break;
        }
        /*     comment from http://www.felix021.com/blog/read.php?1662

          WIFSTOPPED: return true if the process is paused or stopped while ptrace is watching on it
          WSTOPSIG: get the signal if it was stopped by signal
         */

        // check the system calls
        ptrace(PTRACE_GETREGS, pidApp, NULL, &reg);

        if (false&&reg.REG_SYSCALL>0&&call_counter[reg.REG_SYSCALL] == 0)   //do not limit JVM syscall for using different JVM
        {
            ACflg = OJ_RE;

            char error[BUFFER_SIZE];
            sprintf(error,"[ERROR] A Not allowed system call: runid:%d callid:%ld\n",
                    solution_id, reg.REG_SYSCALL);
            write_log(error);
            print_runtimeerror(error);
            ptrace(PTRACE_KILL, pidApp, NULL, NULL);
         //   wait4(pidApp,NULL,0,NULL);
        }
        else
        {
            if (sub == 1 && call_counter[reg.REG_SYSCALL] > 0)
                call_counter[reg.REG_SYSCALL]--;


            if(reg.REG_SYSCALL==SYS_fork||reg.REG_SYSCALL==SYS_clone||reg.REG_SYSCALL==SYS_vfork)//
            {
                if(sub_level>3&&sub==1)
                {
                    printf("sub are not allowed to fork!\n");
                    ptrace(PTRACE_KILL, pidApp, NULL, NULL);

                }
                else
                {
                    //printf("syscall:%ld\t",regs.REG_SYSCALL);
                    ptrace(PTRACE_SINGLESTEP, pidApp,NULL, NULL);

                    ptrace(PTRACE_GETREGS, pidApp,
                           NULL, &reg);
                    //printf("pid=%lu\n",regs.eax);
                    pid_t subpid=reg.REG_RET;
                    if(subpid>0&&subpid!=subwatcher)
                    {
                        //ptrace(PTRACE_ATTACH, subpid,               NULL, NULL);
                        //wait(NULL);

                        subwatcher=fork();
                        if(subwatcher==0)
                        {
                            //total_sub++;
                            sub_level++;
                            pidApp=subpid;
                            int success=ptrace(PTRACE_ATTACH, pidApp,
                                               NULL, NULL);
                            if(success==0)
                            {
                                wait(NULL);
                                printf("attatched sub %d->%d\n",getpid(),pidApp);

                                // ptrace(PTRACE_SYSCALL, traced_process,NULL, NULL);
                            }
                            else
                            {
                                //printf("not attatched sub %d\n",traced_process);

                                exit (0);
                            }
                        }



                    }
                }
                reg.REG_SYSCALL=0;

            }
        }
        sub = 1 - sub;


        ptrace(PTRACE_SYSCALL, pidApp, NULL, NULL);
    }
    usedtime += (ruse.ru_utime.tv_sec * 1000 + ruse.ru_utime.tv_usec / 1000);
    usedtime += (ruse.ru_stime.tv_sec * 1000 + ruse.ru_stime.tv_usec / 1000);
    if(sub_level) exit(0);
    //clean_session(pidApp);
}
void clean_workdir(char * work_dir )
{
    if (DEBUG)
    {
        execute_cmd("mv %s/* %slog/", work_dir, work_dir);
    }
    else
    {
        execute_cmd("umount %s/proc", work_dir);
        execute_cmd("rm -Rf %s/*", work_dir);

    }

}

void init_parameters(int argc, char ** argv, int & solution_id,int & runner_id)
{
    if (argc < 3)
    {
        fprintf(stderr, "Usage:%s solution_id runner_id.\n", argv[0]);
        fprintf(stderr, "Multi:%s solution_id runner_id judge_base_path.\n",
                argv[0]);
        fprintf(stderr,
                "Debug:%s solution_id runner_id judge_base_path debug.\n",
                argv[0]);
        exit(1);
    }
    DEBUG = (argc > 4);
    if (argc > 3)
        strcpy(oj_home, argv[3]);
    else
        strcpy(oj_home, "/home/judge");

    chdir(oj_home); // change the dir// init our work

    solution_id = atoi(argv[1]);
    runner_id = atoi(argv[2]);
}
int get_sim(int solution_id, int lang, int pid, int &sim_s_id)
{
    char src_pth[BUFFER_SIZE];
    //char cmd[BUFFER_SIZE];
    sprintf(src_pth, "Main.%s", lang_ext[lang]);

    int sim = execute_cmd("sim.sh %s %d", src_pth, pid);
    if (!sim)
    {
        execute_cmd("mkdir ../data/%d/ac/", pid);

        execute_cmd("mv %s ../data/%d/ac/%d.%s", src_pth, pid, solution_id,
                    lang_ext[lang]);
        //c cpp will
        if(lang==0)execute_cmd("ln ../data/%d/ac/%d.%s ../data/%d/ac/%d.%s", pid, solution_id,
                                   lang_ext[lang], pid, solution_id,lang_ext[lang+1]);
        if(lang==1)execute_cmd("ln ../data/%d/ac/%d.%s ../data/%d/ac/%d.%s", pid, solution_id,
                                   lang_ext[lang], pid, solution_id,lang_ext[lang-1]);


    }
    else
    {

        FILE * pf;
        pf = fopen("sim", "r");
        if (pf)
        {
            fscanf(pf, "%d%d", &sim, &sim_s_id);
            fclose(pf);
        }

    }
    if(solution_id<=sim_s_id) sim=0;
    return sim;
}
void mk_shm_workdir(char * work_dir)
{
    char shm_path[BUFFER_SIZE];
    sprintf(shm_path,"/dev/shm/hustoj/%s",work_dir);
    execute_cmd("mkdir -p %s",shm_path);
    execute_cmd("rm -rf %s",work_dir);
    execute_cmd("ln -s %s %s/",shm_path,oj_home);
    execute_cmd("chown judge %s ",shm_path);
    execute_cmd("chmod 755 %s ",shm_path);
    //sim need a soft link in shm_dir to work correctly
    sprintf(shm_path,"/dev/shm/hustoj/%s/",oj_home);
    execute_cmd("ln -s %s/data %s",oj_home,shm_path);

}
int count_in_files(char * dirpath)
{
    const char  * cmd="ls -l %s/*.in|wc -l";
    int ret=0;
    FILE * fjobs=read_cmd_output(cmd,dirpath);
    fscanf(fjobs,"%d",&ret);
    pclose(fjobs);

    return ret;
}

int get_test_file(char* work_dir,int p_id)
{
    char filename[BUFFER_SIZE];
    char localfile[BUFFER_SIZE];
    int ret=0;
    const char  * cmd=" wget --post-data=\"gettestdatalist=1&pid=%d\" --load-cookies=cookie --save-cookies=cookie --keep-session-cookies -q -O - \"%s/admin/problem_judge.php\"";
    FILE * fjobs=read_cmd_output(cmd,p_id,http_baseurl);
    while(fgets(filename,BUFFER_SIZE-1,fjobs)!=NULL)
    {
        sscanf(filename,"%s",filename);
        sprintf(localfile,"%s/data/%d/%s",oj_home,p_id,filename);
        if(DEBUG) printf("localfile[%s]\n",localfile);
        if(access(localfile,0)==-1)
        {
            if(strcmp(filename,"spj")==0) continue;
            execute_cmd("mkdir -p %s/data/%d",oj_home,p_id);
            const char * cmd2=" wget --post-data=\"gettestdata=1&filename=%d/%s\" --load-cookies=cookie --save-cookies=cookie --keep-session-cookies -q -O \"%s\"  \"%s/admin/problem_judge.php\"";
            execute_cmd(cmd2,p_id,filename,localfile,http_baseurl);
            ret++;

            if(strcmp(filename,"spj.c")==0)
            {
                //   sprintf(localfile,"%s/data/%d/spj.c",oj_home,p_id);
                if(access(localfile,0)==0)
                {
                    const char * cmd3="gcc -o %s/data/%d/spj %s/data/%d/spj.c";
                    execute_cmd(cmd3,oj_home,p_id,oj_home,p_id);
                }

            }
            if(strcmp(filename,"spj.cc")==0)
            {
                //     sprintf(localfile,"%s/data/%d/spj.cc",oj_home,p_id);
                if(access(localfile,0)==0)
                {
                    const char * cmd4="g++ -o %s/data/%d/spj %s/data/%d/spj.cc";
                    execute_cmd(cmd4,oj_home,p_id,oj_home,p_id);
                }
            }
        }

    }
    pclose(fjobs);

    return ret;
}
int main(int argc, char** argv)
{

    char work_dir[BUFFER_SIZE];
    //char cmd[BUFFER_SIZE];
    char user_id[BUFFER_SIZE];
    int solution_id = 1000;
    int runner_id = 0;
    int p_id, time_lmt, mem_lmt, lang, isspj, sim, sim_s_id,max_case_time=0;

    init_parameters(argc, argv, solution_id, runner_id);

    init_mysql_conf();

    if (!http_judge&&!init_mysql_conn())
    {
        exit(0); //exit if mysql is down
    }
    //set work directory to start running & judging
    sprintf(work_dir, "%s/run%s/", oj_home, argv[2]);

    if(shm_run) mk_shm_workdir(work_dir);

    chdir(work_dir);
    execute_cmd("rm %s/*",work_dir);

    if(http_judge)
        system("ln -s ../cookie ./");
    get_solution_info(solution_id, p_id, user_id, lang);
    //get the limit


    if(p_id==0)
    {
        time_lmt=1;
        mem_lmt=128;
        isspj=0;
    }
    else
    {
        get_problem_info(p_id, time_lmt, mem_lmt, isspj);
    }
    //copy source file

    get_solution(solution_id, work_dir, lang);

    //java is lucky
    if (lang >= 3)
    {
        // the limit for java
        time_lmt = time_lmt + java_time_bonus;
        mem_lmt = mem_lmt + java_memory_bonus;
        // copy java.policy
        execute_cmd( "cp %s/etc/java0.policy %sjava.policy", oj_home, work_dir);

    }

    //never bigger than judged set value;
    if (time_lmt > 300 || time_lmt < 1)
        time_lmt = 300;
    if (mem_lmt > 1024 || mem_lmt < 1)
        mem_lmt = 1024;

    if (DEBUG)
        printf("time: %d mem: %d\n", time_lmt, mem_lmt);

    // compile
    //      printf("%s\n",cmd);
    // set the result to compiling
    int Compile_OK;

    Compile_OK = compile(lang);
    if (Compile_OK != 0)
    {
        update_solution(solution_id, OJ_CE, 0, 0, 0,0, 0.0);
        addceinfo(solution_id);
        update_user(user_id);
        update_problem(p_id);
        if(!http_judge)
            mysql_close(conn);
        if (!DEBUG)
            clean_workdir(work_dir);
        else
            write_log("compile error");
        exit(0);
    }
    else
    {
        update_solution(solution_id, OJ_RI, 0, 0, 0,0, 0.0);
    }
    //exit(0);
    // run
    char fullpath[BUFFER_SIZE];
    char infile[BUFFER_SIZE];
    char outfile[BUFFER_SIZE];
    char userfile[BUFFER_SIZE];
    sprintf(fullpath, "%s/data/%d", oj_home, p_id); // the fullpath of data dir



    // open DIRs
    DIR *dp;
    dirent *dirp;
    // using http to get remote test data files
    if (p_id>0&&http_judge)
        get_test_file(work_dir,p_id);
    if (p_id>0&&(dp = opendir(fullpath)) == NULL)
    {

        write_log("No such dir:%s!\n", fullpath);
        if(!http_judge)
            mysql_close(conn);
        exit(-1);
    }

    int ACflg, PEflg;
    ACflg = PEflg = OJ_AC;
    int namelen;
    int usedtime = 0, topmemory = 0;

    //create chroot for ruby bash python
    if (lang == 4)
        copy_ruby_runtime(work_dir);
    if (lang == 5)
        copy_bash_runtime(work_dir);
    if (lang == 6)
        copy_python_runtime(work_dir);
    if (lang == 7)
        copy_php_runtime(work_dir);
    if (lang == 8)
        copy_perl_runtime(work_dir);
    if (lang == 9)
        copy_mono_runtime(work_dir);
    if (lang == 10)
        copy_objc_runtime(work_dir);
    // read files and run
    // read files and run
    double pass_rate=0.0;
    int num_of_test=0;
    int finalACflg=ACflg;
    if(p_id==0)   //custom input running
    {
        printf("running a custom input...\n");
        get_custominput(solution_id,work_dir);
        init_syscalls_limits(lang);
        pid_t pidApp = fork();

        if (pidApp == 0)
        {
            run_solution(lang, work_dir, time_lmt, usedtime, mem_lmt);
        }
        else
        {
            watch_solution(pidApp, infile, ACflg, isspj, userfile, outfile,
                           solution_id, lang, topmemory, mem_lmt, usedtime, time_lmt,
                           p_id, PEflg, work_dir);

        }
        if(ACflg == OJ_TL)
        {
            usedtime=time_lmt*1000;
        }
        update_solution(solution_id, OJ_TR, usedtime, topmemory >> 10, 0,0,0);
        if(ACflg==OJ_RE)
        {
            if(DEBUG) printf("add RE info of %d..... \n",solution_id);
            addreinfo(solution_id);
        }
        else
        {
            addcustomout(solution_id);
        }
        exit(0);
    }

    for (; (oi_mode|| ACflg == OJ_AC )&& (dirp = readdir(dp)) != NULL;)
    {

        namelen = isInFile(dirp->d_name); // check if the file is *.in or not
        if (namelen == 0)
            continue;

        prepare_files(dirp->d_name, namelen, infile, p_id, work_dir, outfile,
                      userfile, runner_id);
        init_syscalls_limits(lang);

        pid_t pidApp = fork();

        if (pidApp == 0)
        {

            run_solution(lang, work_dir, time_lmt, usedtime, mem_lmt);
        }
        else
        {




            watch_solution(pidApp, infile, ACflg, isspj, userfile, outfile,
                           solution_id, lang, topmemory, mem_lmt, usedtime, time_lmt,
                           p_id, PEflg, work_dir);


            judge_solution(ACflg, usedtime, time_lmt, isspj, p_id, infile,
                           outfile, userfile, PEflg, lang, work_dir, topmemory,
                           mem_lmt, solution_id,num_of_test);
            if(use_max_time)
            {
                max_case_time=usedtime>max_case_time?usedtime:max_case_time;
                usedtime=0;
            }
            //clean_session(pidApp);
        }
        if(oi_mode)
        {
            if(ACflg == OJ_AC)
            {
                ++ pass_rate;
            }
            if (finalACflg < ACflg)
            {
                finalACflg = ACflg;
            }
            num_of_test++;
            ACflg = OJ_AC;
        }
    }
    if (ACflg == OJ_AC && PEflg == OJ_PE)
        ACflg = OJ_PE;
    if (sim_enable && ACflg == OJ_AC &&(!oi_mode||finalACflg==OJ_AC)&& lang < 5)  //bash don't supported
    {
        sim = get_sim(solution_id, lang, p_id, sim_s_id);
    }
    else
    {
        sim = 0;
    }
    //if(ACflg == OJ_RE)addreinfo(solution_id);

    if((oi_mode&&finalACflg==OJ_RE)||ACflg==OJ_RE)
    {
        if(DEBUG) printf("add RE info of %d..... \n",solution_id);
        addreinfo(solution_id);
    }
    if(use_max_time)
    {
        usedtime=max_case_time;
    }
    if(ACflg == OJ_TL)
    {
        usedtime=time_lmt*1000;
    }
    if(oi_mode)
    {
        if(num_of_test>0) pass_rate/=num_of_test;
        update_solution(solution_id, finalACflg, usedtime, topmemory >> 10, sim,
                        sim_s_id,pass_rate);
    }
    else
    {
        update_solution(solution_id, ACflg, usedtime, topmemory >> 10, sim,
                        sim_s_id,0);
    }
    if((oi_mode&&finalACflg==OJ_WA)||ACflg==OJ_WA)
    {
        if(DEBUG) printf("add diff info of %d..... \n",solution_id);
        adddiffinfo(solution_id);
    }
    update_user(user_id);
    update_problem(p_id);
    clean_workdir(work_dir);

    if (DEBUG)
        write_log("result=%d", oi_mode?finalACflg:ACflg);
    if(!http_judge)
        mysql_close(conn);


    return 0;
}
